Results 1 to 10 of about 273,560 (124)
Lubricated axisymmetric gravity currents of power-law fluids [PDF]
, 2021 The motion of glaciers over their bedrock or drops of fluid along a solid surface can become unstable when these substrates are lubricated. Previous studies modeled such systems as coupled gravity currents (GCs) consisting of one fluid that lubricates the flow of another fluid, and having two propagating fronts.
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Fluid-electromagnetic helicities and knotted solutions of the fluid-electromagnetic equations [PDF]
, 2022 In this paper we consider an Euler fluid coupled to external electromagnetism. We prove that the Hopfion fluid-electromagnetic knot, carrying fluid and electromagnetic (EM) helicities, solves the fluid dynamical equations as well as the Abanov Wiegmann (AW) equations for helicities, which are inspired by the axial-current anomaly of a Dirac fermion. We
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Entropy Current and Fluid-Gravity Duality in Gauss-Bonnet theory [PDF]
JHEP 09 (2023) 070, 2022 Working within the approximation of small amplitude expansion, recently an entropy current has been constructed on the horizons of dynamical black hole solution in any higher derivative theory of gravity. In this note, we have dualized this horizon entropy current to a boundary entropy current in an asymptotically AdS black hole metric with a dual ...
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Gauge-invariant microscopic kinetic theory of superconductivity in response to electromagnetic fields [PDF]
Phys. Rev. B 98, 094507 (2018), 2018 Within a gauge-invariant microscopic kinetic theory, we study the electromagnetic response in the superconducting states. Both superfluid and normal-fluid dynamics are involved. We predict that the normal fluid is present only when the excited superconducting velocity $v_s$ is larger than a threshold $v_L=|\Delta|/k_F$.
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Axial-Current Anomaly in Euler Fluid [PDF]
Physical Review Letters 128.5 (2022): 054501, 2021 We argue that a close analog of the axial-current anomaly of quantum field theories with fermions occurs in the classical Euler fluid. The conservation of the axial current (closely related to the helicity of inviscid barotropic flow) is anomalously broken by the external electromagnetic field as $\partial_\mu j_{A}^\mu = 2\,\bf E\!\cdot\!
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Capillary-Driven Instability of Immiscible Fluid Interfaces Flowing in Parallel in Porous Media [PDF]
Phys. Rev. E 78, 035302(R) (2008), 2007 When immiscible wetting and non-wetting fluids move in parallel in a porous medium, an instability may occur at sufficiently high capillary numbers so that interfaces between the fluids initially held in place by the porous medium are mobilized. A boundary zone containing bubbles of both fluids evolve which has a well defined thickness. This zone moves
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Decoupled Boundary Handling in SPH [PDF]
arXiv, 2023 Particle-based boundary representations are frequently used in Smoothed Particle Hydrodynamics (SPH) due to their simple integration into fluid solvers. Commonly, incompressible fluid solvers estimate the current density and corresponding forces in case the current density exceeds the rest density to push fluid particles apart.
arxiv
Lubricated gravity currents of power-law fluids [PDF]
, 2020 The motion of glaciers over their bedrock or drops of fluid along a solid surface can vary dramatically when these substrates are lubricated. We investigate the coupled flow of a gravity current (GC) of strain-rate softening fluid that is lubricated by a denser, lower-viscosity Newtonian fluid.
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Entropy current for non-relativistic fluid [PDF]
JHEP 1408 (2014) 037, 2014 We study transport properties of a parity-odd, non-relativistic charged fluid in presence of background electric and magnetic fields. To obtain stress tensor and charged current for the non-relativistic system we start with the most generic relativistic fluid, living in one higher dimension and reduce the constituent equations along the light-cone ...
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Scale-to-scale energy transfer rate in compressible two-fluid plasma turbulence [PDF]
Physical Review E 101 (2020) 043212, 2020 We derive the exact relation for the energy transfer in three-dimensional compressible two-fluid plasma turbulence. In the long-time limit, we obtain an exact law which expresses the scale-to-scale average energy flux rate in terms of two point increments of the fluid variables of each species, electric and magnetic field and current density, and puts ...
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